| In Pahia, above the lava beds, where thin paleosol is developed at locations, two sections of flow units of the Kos plateau tuff are observed on the Pahia islet. The lower section consists of fine white ash with sub-parallel or cross-bedding layering and few rounded white pumice lapilli, in thin layers with often reverse grading, supported by the matrix. A low percentage of lava and schist lithic lapilli (10-15%) is identified.
Maximum thickness of the section is 3 meters. Sedimentation structures indicate that it has been deposited from surge pyroclastic density currents in sandwave phases. |
| The upper section consists of unlayered lapilli tuff from markedly porphyric rounded white – gray pumice matrix-supported, with several lava and schist lithic blocks whose diameter reaches up to one (1) meter. Maximum thickness of the current section is 5 meters. |
| Pumice contains several phenocrystals of plagioclase, sanidine and biotite. |
| Only the upper flow unit is identified in Pyrgousa, at a thickness reaching even 10 meters at areas of lower elevation. |
